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- W4221150192 abstract "In this paper, we derive closed form solutions for the quasi-stationary problems of moving heat sources within the gradient theory of heat transfer. This theory can be formally deduced from the two-temperature model and it can be treated as a generalized variant of the Guyer–Krumhansl model with the fourth order governing equation. We show that considered variant of the gradient theory allows to obtain useful singularity-free solutions for the moving point and line heat sources that can be used for the refined analysis of the melt pool shape in the laser powder bed fusion processes. Derived solutions contain single additional length scale parameter that can be related to the mean size of the powder particles . Namely, we show that developed gradient models allow to describe the decrease of the melt pool depth with the increase of the powder’s particles size that was observed previously in the experiments. We also derived the dimensionless relations that can be used for the experimental identification of the model’s length scale parameter for different materials. Semi-analytical solution for the Gaussian laser beam is also derived and studied based on the Green function method within the considered theory." @default.
- W4221150192 created "2022-04-03" @default.
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- W4221150192 date "2022-11-01" @default.
- W4221150192 modified "2023-09-27" @default.
- W4221150192 title "Gradient models of moving heat sources for powder bed fusion applications" @default.
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- W4221150192 doi "https://doi.org/10.1016/j.ijheatmasstransfer.2022.123221" @default.
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